摘要
混凝土桥墩截面的弯矩-曲率分析是进行桥梁延性抗震设计的基础,截面材料、几何尺寸及轴向荷载等参数都会对其弯矩-曲率特性产生影响。本文利用Matlab编制了混凝土圆形桥墩截面的弯矩-曲率特性分析程序,研究截面各参数对其弯矩-曲率特性的影响。研究结果表明,混凝土强度过高、纵向钢筋配筋率与结构承受轴力增大时,桥墩截面的延性耗能能力降低;而箍筋配箍率的增大会增强桥墩截面的延性耗能能力;当纵筋配筋率或箍筋配箍率一定时,桥墩延性不受钢筋直径的影响。
The moment-curvature relationships of concrete pier cross-section are the basis of bridge anti-seismic design. The moment- curvature relationships will be influenced by various parameters of the cross-section. The influencing factors are analyzed by Matlab in this paper. The results show that the pier cross-section ductility is reduced by overhigh concrete strength orincreasing the longitudinal reinforcing steels ratio and theaxial force. The ductility of pier cross-section is improved by increasing the transverse reinforcing steel ratio. The ductility of pier cross-section isn＇ t affected by the size of reinforcing steel bar when the longitudinal reinforcing steel ratio and the transverse reinforcing steel ratio are invariable.
出处
《工程抗震与加固改造》
北大核心
2017年第3期59-66,共8页
Earthquake Resistant Engineering and Retrofitting
基金
内蒙古交通科技项目(NJ-2015-26)
关键词
桥梁抗震
延性
弯矩-曲率分析
影响因素
bridge anti-seismic
ductility
moment-curvature relationships analyses
influencing factors
